Issue #26800: Undocumented support of general bytes-like objects

as paths in os functions is now deprecated.

2 files changed, 11 insertions, 2 deletions

diff --git a/Lib/test/test_os.py b/Lib/test/test_os.py
index aa9b538748..d8920d99c5 100644
--- a/Lib/test/test_os.py
+++ b/Lib/test/test_os.py
@@ -2626,6 +2626,7 @@ class OSErrorTests(unittest.TestCase):
         else:
             encoded = os.fsencode(support.TESTFN)
         self.bytes_filenames.append(encoded)
+        self.bytes_filenames.append(bytearray(encoded))
         self.bytes_filenames.append(memoryview(encoded))
 
         self.filenames = self.bytes_filenames + self.unicode_filenames
@@ -2699,8 +2700,14 @@ class OSErrorTests(unittest.TestCase):
         for filenames, func, *func_args in funcs:
             for name in filenames:
                 try:
-                    with bytes_filename_warn(False):
+                    if isinstance(name, str):
                         func(name, *func_args)
+                    elif isinstance(name, bytes):
+                        with bytes_filename_warn(False):
+                            func(name, *func_args)
+                    else:
+                        with self.assertWarnsRegex(DeprecationWarning, 'should be'):
+                            func(name, *func_args)
                 except OSError as err:
                     self.assertIs(err.filename, name)
                 else:
diff --git a/Lib/test/test_posix.py b/Lib/test/test_posix.py
index 6a1c82917a..de22513e34 100644
--- a/Lib/test/test_posix.py
+++ b/Lib/test/test_posix.py
@@ -407,8 +407,10 @@ class PosixTester(unittest.TestCase):
     def test_stat(self):
         self.assertTrue(posix.stat(support.TESTFN))
         self.assertTrue(posix.stat(os.fsencode(support.TESTFN)))
-        self.assertTrue(posix.stat(bytearray(os.fsencode(support.TESTFN))))
 
+        self.assertWarnsRegex(DeprecationWarning,
+                'should be string, bytes or integer, not',
+                posix.stat, bytearray(os.fsencode(support.TESTFN)))
         self.assertRaisesRegex(TypeError,
                 'should be string, bytes or integer, not',
                 posix.stat, None)